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Income Tax Matters, Provision Table (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Tax Provision        
Domestic $ 8.5 $ 7.5 $ 24.7 $ 20.5
Foreign 0.2 0.7 1.1 1.4
Total $ 8.7 $ 8.2 $ 25.8 $ 21.9